Solid modeling method and device for joint surface error

Abstract

The embodiment of the invention provides a solid modeling method and device for a joint surface error. The method comprises the following steps of establishing a geometrical characteristic error surface of the joint surface based on the geometrical characteristic error points of the joint surface in a machine tool structure; based on geometrical feature error surface and ideal solid model, establishing the geometrical feature error model of joint surface, in which the ideal solid model is machine tool structure model without geometrical feature error points constructed by computer. The invention provides the solid modeling method and device for the joint surface error, which adopts the geometric characteristic error points of the joint surface of a machine tool structure to construct a geometric characteristic error surface, by combining the geometric feature error surface with the ideal solid model, the geometrical feature error model is established, and the geometrical feature errormodel can truly reflect the joint surface feature error between the actual parts and the ideal solid model constructed by computer, which provides a basis for the machine tool structure optimization design and the accurate calculation and analysis of assembly characteristics prediction.

Description

technical field [0001] The invention relates to the technical field of geometric feature simulation modeling, in particular to a method and device for modeling a joint surface error entity. Background technique [0002] The stability of the machining accuracy of the machine tool is the core criterion for evaluating the quality of the machine tool, especially for key components such as the column, base, and bed of the machine tool, there are many factors that easily cause vibration of these key components, and the vibration of these key components It is easy to affect the machining accuracy of the machine tool, resulting in unstable machining accuracy, which leads to the geometric feature error of the machining joint surface of the machine tool. [0003] In particular, the actual mating area of ​​these key components belongs to the point contact joint surface, and the distribution of the contact points and the number of contact points become the key to the stability of assemb...

AI Technical Summary

Problems solved by technology

However, for a long time, the optimal design calculation models of machine tools belong to smooth surface contact and approximate regular contact surface, and there is a big gap with the characteristics of the actual joint surface, which leads to inaccurate machine tool optimal design and performance analysis, which in turn makes machine tool optimal design and Predictive analytics has the following problems:

[0005] (2) Due to the existence of the geometric feature error of the joint surface between the established joint surface model and the actual geometric surface feature model, when evaluating the stability of machine tool machining accuracy, the evaluation results of machine tool accuracy stability are seriously affected, resulting in analysis results Inaccurate

[0006] (3) Due to the existence of the geometric feature error of the joint surface between the established joint surface model and the actual geometric surface feature model, the equipment rigidity caused by the joint surface cannot be accurately calculated, and it is difficult to optimize the structural stability of high-precision machine tools Performance Evaluation of Design and Accuracy Variations

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